Are there any potential pitfalls when using array_intersect() in PHP for comparing arrays?

When using array_intersect() in PHP to compare arrays, one potential pitfall is that the function only compares values and not keys. This means that if the keys are important in your comparison, you may not get the desired result. To overcome this, you can use array_intersect_assoc() which compares both keys and values of the arrays. 

$array1 = ['a' => 1, 'b' => 2, 'c' => 3];
$array2 = ['b' => 2, 'c' => 3, 'd' => 4];

$result = array_intersect_assoc($array1, $array2);

print_r($result);

Keywords

array_intersect PHP arrays comparison pitfalls

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